Performance stability, high accuracy. Ease of operation and high quality work results. Available in the extension rod handle, can be used for clamping drill, milling cutter, straight tool. Collet must be assembled into the clamping nut before inserting into the chuck. It is a precision collet for professionals and hobbyists demanding ease of operation and high quality work results. Type:ER32 Inner diameter:2 /4 /6 /8 /10 /12 /16 /18 /20mm Material:metal colour:Silver Package Contents: 1 * ER32 MT3 M12 Collet Chuck 9 * ER32 Spring Collet Set Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.